Process of producing calcium carbid.



M. W, MURRAY,-

PROGESS OF PRODUCING CALCIUM GARBID.

- APPLICATION FILED JAN. m2.

" WITNESSES.

v By a A TTOH/VEY irnn stares rjrn'r 1 VIICHAEL w. MURRAY, or NEW YORK, 1v. ASSIGNOR or FIFTY ona-rronnnnnrns T0 anon-sun. ROSENBLATT, or NEW YORK, N. Y.

PROCESS OF PRODU'CING'CALCIUM CARBID.

To all whom it may concern Be it known that I, MICHAEL 'W. MURRAY,-

a citizen of the United States of America, anda resident of New York, county and State of New York, have invented certain new and useful Improvements in Processes of Producing Calcium Carbid, of which the following is a specification.

This invention has reference to a novel process of producing high heat from gas mixtures.

. It pertains particularly to the production of such high temperatures as are required for instance in the manufacture of calcium carbid, carborundum and the like.

Processes of this kind are purely thermal ones and the cost of production depends entirely on the method employed for generating the caloric energy to which the mixture of the prepared components of the substance to be made is subjected, usually for fusion. Such high temperatures are for example produced with the electric arc.

However the generation of the current, even by water power, is relatively expensive and therefore the application of thefinal product limited and in some instances its cost of production prohibitive. I i

It is the purpose of the present invention to produce such high temperatures at a greatly reduced cost according to purely amount of heat contained therein. By sub- .jecting these 'vapors to combustion through surface resistance novel heat effectsare produced at. arelatively low cost. With a gas mixture such as carbureted water gas to which there is added a volume of air. somewhat in excess of that necessary to produce takes place.

' an explosive mixture, temperatures of 2,500 O. are attained. .Te'mperatur'es beyond 2,500 C. and up to 4,000", C. are attainable, when the gas or gases of the'explosive mixture of gas and air, are of the aromatic series which are compounds-derived from benzene, C l-I having one or more closed rings or nuclei per molecule and "more particularly hydrocarbon gasestof the fatty series which are compounds derived from methane, CH*; with double or treble bond linkings or atomic affinities saturated between carbon atoms in. the molecule;

| C (l, CEO and finally the vapors of l explosive substances or compounds, as for instance the vapors of picric acid when such gases or explosive vapors form components of the gasfmixt-ure, composed of ases rich incarbon, for example hydrocar on gases Specification of Letters Patent. j Patented Apr. 29, 1913. Application filed January 30, 1912. Serial No. 674,346. I}

which are subjected to the surface combus- I tion process, then exceedingly high tempera tures may be reached.

11H order to render the invention. entirely clear reference is made to the accompanying drawing in which an apparatus is diagrammatically illustrated that may be used in carrying out the present process.

In the drawing arepresentsthe air inlet, 1) the gas inlet, 0 the mixing chamber, 03' the superheater and e, e, conducting pipes leading from the superheater to the carbureter f. A spray valve 9 is. adaptedto .issue car- 'bureting mixtures or gases into the air and gas mixture. A pipe it leads from the car- 'bureter into a pipe 71 fI'OHIWhlCh the gas" mixture passes into a chamber partly filled with refractory substances 7a. In this bed of refractory materials surface combustion The materials subjected to the,

excessive high heat vgeneratedpasses below a the bed of refractory material on a conveyer Z. If'itis desired superheated gas and air mixtures may be used directly. In thisinstance the valve m in the pipe e is operated to close off the-carbureter either wholly or partly.

In carrying this invention into effect I substantially proceed as follows: I mix gas composed essentially of carbon monoxid and hydrogen with air. This mixture is passed through the superheater so that it acquires a certain temperature. The'heated mixture is now carbureted for' the purpose, of making it rich in carbon This. gas mixture-may forcertainpurposes be directly subjected tothe surface combustion. process;v In other 1n- -stances where higher temperatures, are re-- quired vapors o explosive substances or compounds may be mixed with the above described gas mixture before .it' is combusted" through the surface resistance'in; this process. For instance-vapors of picric acid,'

tainable 'is reached when the air .volume therein is such as to support combustion even in an atmosphere of carbon dioxid gas, CO -When the explosive mixture of'gas -'and air is carbureted with gases of the aromatic series which may be produced forinstance from naphthalene, C I-I I add five cubic feet of air for ,every half cubic foot of.

' gas. For gaseswith double bond linkings of the fatty seriesjfor instance ethylene,

C I-L or when a treble bonded gas is used like acetylene-(3 H? 'sufi'ic'ientfair must-be added to combust-fall the carbon in these gases. When explosive substances such as picric'iacid va'pors are mixed with the gas the airadded thereto must be in excess'of that necessary for combusting all the carbon in the gas: It is' of course understood that -these additions'jof air are in excess of the -volume of air already imparted to the gas :for the purpose of rendering it an explosive mixture. Inusingthe vapors of explosive substances such for instance asgpicric acid x -the vapor-of the'substance' is imparted to the'gas mixture either bysuperh'eating the gas mixture to a temperature at which the substance vaporizes and thus charge the gas mixture with the vapor of the substance by contact, or by superheating the gas mixture to a fairly high temperature and causing the gasmixture so heated to passthroug'h' a carbureter constructed of checker-work fire brick for instance. Over the surface of the carburetuer there being simultaneously sprayed alcohol or 'gasolene or bther liquids whose pr 'perties permit of carrying picric acid in solution; I

When explosive mixtures of gas and air, ;or' any such-mixture with the additions of .airand gases of the-aromatic series, gases of linkings, vapors-of explosive substances such [double bond linkings, gases of treble bond as for instance of picric acid are forced under pressure through'a bed of refractory substances,- for instance small pieces of magnesia, andignited, then surface combustion takes place. On emerging from the place of combustion v temperatures are produced which will permit of the very economicalproductionof such compoundsuas calcium carbid, 'etc The reaction taking'place during the formation of calcium carbid is as This product thus is made at a greatly reduced Jc'ost according to purely chemical methods. p

I claim as myinvention:--

1, The process of producing" hightem' peratures by purely chemical methods fortechnical purposes consisting in superheat-j ing and carburetin'g'explosive gas mixtures and combusting them' through surface resistance where contact action takes place, generating thus enormous caloric energy. f

2. The process of producing chemically very high temperatures adaptedfor the production of calcium carbid and the like consisting in superheating and carbureting explosive gas mixtures and combustin them through surface resistance formed 0 a bed of heated small pieces of magnesia where contact action takes place, generating'thus enormous caloric energy.

3.3The process of producing chemically very high temperatures adapted for the pro-- v duction of calcium carbid and the like consisting in 'superheating explosivegas mixtures, carburetin them partly with picric acid vapors,. an subject ng the said, mix- "tures to combustion through surface resistance where contact action takes place generating thus enormous caloric energy.

4. The process. of producing chemicallyyery high temperatures for the production of calcium carbid andtheil ike consisting in superheating explosive gas mixtures, carbureting them partly with picric acid va-- pors, and subjecting the said mixtures while under pressure to combustion'throughsun face resistance where contact action takes .place, generating thus enormous caloric energy.

very high temperatures adapted for the production of calcium carbid and the like consisting in superheat-ing explosive. gas mix- 5. The process of producing chemically tures, carbureting them partly with picric acid vapors,and subjecting the said mixtures to combustion through surface resist-- ance formed of a bed of heated small pieces of magnesia where contact action takes.

place, generating thus enormops caloric energy.

6.'The process of producing chemically 1 i very high temiaeratures adapted for the pm) tion takes place, generating thus enormous duction of calcium cal-bid and the like concaloric energy.-

' 1 0 sisting in superheating explosive gas mix Signed at New York, N. Y., this 27th day tures,- carburetingthem partly with picric of January 1912.

acid vapors, and subjecting the said mixtures MCHAEL W. MURRAY. While under pressure to combustion through Witnesses: surface resistance formed of a bed of heated EMMA A. McCARmcK',

small pieces of magnesia, where contact ac- MARIE H. LEHB. 

